Question

Draw the condensed structural formula, or line-angle formula, if cyclic, for each of the following.

a. 1-pentene

b. 2-methyl-1-butene

c. 3-methylcyclohexane

d. 3-chloro-1-butyne

Short answer

a.

b.

c.

d.

Step-by-step solution

Part (a) Given information

The given compound is 1-pentene.

Part (a) Explanation

• Alkene is a hydrocarbon that consists of carbon and hydrogen atoms, containing a triple bond between two carbon atoms.
• The given compound is 1-pentene, i.e. an alkene where the parent chain is of five carbon atoms i.e., pentene having a double bond at first carbon atom.
• The condensed structural formula of 1-pentene is given as follows:

Part (b) Given information

The given compound is 2-methyl-1-butene.

Part (b) Explanation

• Alkene is a hydrocarbon that consists of carbon and hydrogen atoms, containing a triple bond between two carbon atoms.

• The given compound is 2-methyl-1-butene. The compound has a parent chain that is butene which is made up of four carbon atoms where a double bond is at the first carbon atom and a substituent i.e., methyl on the second carbon.
• The condensed structural formula of 2-methyl-1-butene is given as follows:

Part (c) Given Information

The given compound is 3-methylcyclohexane.

Part (c) Explanation

• Cycloalkane consists of carbon and hydrogen atoms that are present in a ring structure.
• The given compound is 3-methylcyclohexane, the parent chain for this compound is cyclohexane which has a methyl substituent at a third carbon atom.
• The line angle formula for 3-methylcyclohexane is given as follows:

Part (d) Given information

The given compound is 3-chloro-1-butyne.

Part (d) Explanation

• An alkyne is a hydrocarbon that is composed of carbon and hydrogen atoms containing a triple bond between two carbon atoms.
• The given compound is 3-chloro-1-butyne. The parent chain in this compound is butyne where the triple bond is at the first carbon atom and a methyl substituent at the third carbon atom.
• The condensed structural formula for 3-chloro-1-butyne is given as follows: